BeamCalc calculates beam geometry and photometrics for multiple sources.

• How wide an area will this light cover?
• How bright will it be?
• How long will the shadow be?
• Where do I need to focus this light in relation to that other one?
• Should I use a 26 degree or a 19 degree at this location?
• What angle is that cove position from the stage?
• What wattage lamp should I use in this fixture?

Set source and target positions for three separate lights by entering measurements on BeamCalc's Numbers page, or by dragging them on the Drawing page. Distances can be in feet or meters, and the drawing scale can be changed by "pinch" zooming. Select fixtures and lamps from the Sources page.

View BeamCalc's built-in guided tour help file here for much more detail. (Opens pop-up window, requires JavaScript.)